Improvement in apparatus for feeding fuel to ore reducing furnaces



Apparatusfor Feeding Fuel to Dr'e-Reducng Furnaces..

ivm-144,185. Patented NovJJSll Fig, i.

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anims II. BOYD, or cHIOAco, ILLINoIs.

IMPROVEMENT IN APPARATUS FOR FEEDING FUEL TO OREREDUCING FURNACES.

`Speeication formingpart of Letters Patent N0. ZLlS, dated November 4,1873,: application filed October 14, 1873.

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To all whom 'it may concern:

Be it known that I, JAMES H. BOYD, of Chicago, in the county of Cook andState of Illinois, have invented certain Improvements in Arrangement andMechanism for Feeding Fuel to Furnaces for Reducing Orcs, of which thefollowing is a specification:

In furnaces for reducing ores it is necessary that an intense,prolonged, and uniform heat be preserved. The fuel must, therefore, .bc

supplied to the grate continually in small quan tities, and should bealways spread or cast over the fire, so as to not check the combustion.what warmed and partially coked before it is fed to the grate, to savedamping the fire and to prevent too great an amount of smoke in thereducing-chamber, whichnwould hinder the a small chamber on a level withthe grate,

where is placed a trap or valve to regulate the ilow of coal upon thisincline, and a rockerarm or grate suspended before the iire and fittedwith curved iingers, so actuated by a proper mechanism as to swing witha sudden drop motion toward the hre at intervals, by which means thecoal crowding down behind it is thrown at intervals quickly, so as toscatter it across the iire. The chamber, being in close proximity to thetire, serves as a cokingchamber to partially coke the fuel before it` iscast upon the re. i v In the accompanying drawing which forni a part ofthis specification, Figure l represents a longitudinal vertical sectionof a reducing-furnace provided with this improved apparatus. Fig. 2 isan end view of the same from the left hand 5 and Fig. 3 is a rear viewIt is also desirable that the fuel be someof a portion of the same,showing the cam mechanism for operating the throwing-fm gers.

Like letters of reference made use of in the several figures indicatelike parts wherever used.

In the said drawing, A represents the firegrate. B is thereducing-chamber. 'llhe other parts of the furnace are shown, as, forexample, the roasting and desulphurizing cylinders, but it will not benecessary to describe them. Above the roof or arch C, which covers thegrate and reducing-ch amber, is erected a warmair space, D, inclosed bythe walls of the fur nace and covered by the inclined way E, theflooring of which may preferably consist of metal. This way E leads downto and empties int-o a small chamber, Gr, which is guarded by the trapor valve Il, swung to a shaft, 71., which is fitted at the back of thefurnace with a lever, i, and quadrant j, by Ineans of which saidV trapmay be set and held at any point closed or open, or partly open, as thecase may require, thus governing the flow ot' the coal into the smallcokingchamber G. At the gate or opening between the colting-chamber Gand the grate A are swung a number of curved fingers, K, from therock-shaft k. To the end of this rock-shaft 7.', upon the outside and atthe rear of the furnace, is attached a crank piece, m, connected withthe vertical bar a by a joint. rlhis vertical bar, bent at the top intothe hook or I -piece O, rests upon the periphery of the spiral cam Mhung upon the shaft p, and revolved in the direction of the arrow bytheageney of the driving-pnl` ley P.

As the cam revolves the rod u and crankpiece m are alternately liftedslowly and caused to drop with a quick motion, causing the fingers K todraw back slowly and return suddenly with a jerk, thus casting the coalin a scattering manner across the grate.

To assist the sudden return motion a weight, a', may be attached to theerank-piece m.

Having thus fully described my invention,

what I claim, and desire to secure by Letters i Patent, is=

l. -The combination and arrangement of the hot-air chamber D above thegrate A, and reducng-ehalnber B, the ineline E, eokng-ehaan` K, tmp li',chamber G, inclined Way E, and

ber G, and zn mechanism for casting the fuel mechanism M o n m k i j,substantially as from the chamber G upon jthe grate, snbstm- Specified.

tially as specified. I JAMES H. BOYD.

2. The combination of the Curved ngers K,

shaft 7c, crank-piece on, bar u o, :1nd eam M, 't-nesses:

substantially a-s speeied. JOHN V. MUNDAY,

o. The combination of Jshe curved ngers HEINRICH F. BRUNS.

